Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 108 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a spoon lifting a lid (c) a sloping road (d) a tap handle
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a small paper cup (d) coins as the load
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same string
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a battery cell (d) turmeric powder
7. 7.True or false: a steering wheel is an inclined plane. (a) True (b) False
8. 8.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) coins as the load (d) string
11. 11.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) coins as the load
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
16. 16.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a battery cell (d) turmeric powder
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
19. 19.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a bottle opener (d) a slide
20. 20.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a slide (d) a bottle opener
21. 21.True or false: a bottle opener uses a pulley. (a) False (b) True
22. 22.True or false: a sloping road is a lever. (a) True (b) False
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
24. 24.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) coins as the load (d) an empty thread reel
26. 26.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same cup of coins
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) a mirror
30. 30.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) turmeric powder (d) a small paper cup
32. 32.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
33. 33.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
34. 34.True or false: string is needed for the thread-reel pulley. (a) False (b) True
35. 35.True or false: a ramp is an inclined plane. (a) True (b) False
36. 36.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) string (d) a pencil
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys

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